131221124 has 6 divisors (see below), whose sum is σ = 229636974. Its totient is φ = 65610560.

The previous prime is 131221121. The next prime is 131221151. The reversal of 131221124 is 421122131.

131221124 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 113848900 + 17372224 = 10670^2 + 4168^2 .

It is not an unprimeable number, because it can be changed into a prime (131221121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16402637 + ... + 16402644.

It is an arithmetic number, because the mean of its divisors is an integer number (38272829).

Almost surely, 2^131221124 is an apocalyptic number.

It is an amenable number.

131221124 is a deficient number, since it is larger than the sum of its proper divisors (98415850).

131221124 is a wasteful number, since it uses less digits than its factorization.

131221124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32805285 (or 32805283 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 131221124 is about 11455.1789161060. The cubic root of 131221124 is about 508.1609065168.

Adding to 131221124 its reverse (421122131), we get a palindrome (552343255).

The spelling of 131221124 in words is "one hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-four".